Subsequently, describes particularly sending and receiving RTP and RTCP packet in server and client.

随后，详细描述了服务端和客户端rtp的打包发送和接收、RTCP报告包的发送和接收。

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One port is used to carry content (say a video track) and the second (the RTCP port) is mainly used as a feedback mechanism to report on quality and packet loss.

一个端口是用于携带内容(比如视频轨道)，第二个主要(服务器端口)作为一种反馈机制报告质量和包丢失。

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